ABCD is a parallelogram. The diagonals of ABCD intersect at O.

a)2a
b)-a+b
c)-a-b

Can't gugys answer the ratio question. this is urgent the plans of a building is drawn toward scale of 1: 1000. kfc the foyer on the plans measures 62mm by 54mm, how large is the foyer in real life?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be